refactor(routes): move product/products from cms to ecommerce domain

Product and products routes were sitting under /api/cms but conceptually
belong to a separate e-commerce domain. Split them out into a dedicated
ecommerce subrouter mounted at /api/ecommerce.

src/routes/api/cms/index.js

@@ -3,8 +3,6 @@ var routes = require('express').Router();
 routes.use('/user', require('./user.routes'));
 routes.use('/articles', require('./articles.routes'));
 routes.use('/comments', require('./comments.routes'));
-routes.use('/product', require('./product.routes'));
-routes.use('/products', require('./products.routes'));
 routes.use('/profiles', require('./profiles.routes'));
 routes.use('/tags', require('./tags.routes'));